JPH0325082U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は外観斜視図、第２図は正面図、第３図
は側面図、第４図は空洞部形成の一例を示す斜視
図、第５図は同一部の拡大断面図、第６図は第５
図Ａ−Ａ′線に沿つた断面図、第７図は空洞部形
成の他の例を示す斜視図、第８図は同首部の平面
図、第９図は第８図Ｂ−Ｂ′線に沿つた断面図、
第１０図は空洞部形成の更に他の例を示す斜視図
、第１１図はこの考案に係るバタフライ弁の取付
状態を示す側面図、第１２図は従来のバタフライ
弁の取付状態を示す側面図である。 １０……弁本体、１１……流体通路、１２，１
３……首部、１４，１５……弁軸孔、１６……取
付フランジ、１７，１８……空洞部。 Fig. 1 is an external perspective view, Fig. 2 is a front view, Fig. 3 is a side view, Fig. 4 is a perspective view showing an example of cavity formation, Fig. 5 is an enlarged sectional view of the same part, Fig. 6 is the fifth
7 is a perspective view showing another example of cavity formation, FIG. 8 is a plan view of the neck, and FIG. 9 is a sectional view taken along line B-B' in FIG. 8. A cross-sectional view along
FIG. 10 is a perspective view showing still another example of cavity formation, FIG. 11 is a side view showing how the butterfly valve according to this invention is installed, and FIG. 12 is a side view showing how the conventional butterfly valve is installed. It is. 10...Valve body, 11...Fluid passage, 12,1
3... Neck, 14, 15... Valve stem hole, 16... Mounting flange, 17, 18... Cavity.

Claims (1)

【実用新案登録請求の範囲】 (1) 内部に円筒状の流体通路を形成した弁本体
と円板状の弁体と、弁本体と弁体との間に介在す
るシートリングとからなるバタフライ弁であつて
、弁棒を軸支するために弁本体の外周面の直径方
向対向位置から外方へ延び出す首部の少なくとも
流体の流過方向に沿う太さを弁本体の厚みと同一
に形成すると共に、該首部の内部に空洞部を形成
したことを特徴とするバタフライ弁。 (2) 空洞部が弁本体内部にも形成されているこ
とを特徴とする請求項(1)記載のバタフライ弁。 (3) 弁本体並びに首部をフランジ面と平行な中
央面に沿つて分割した２つの割り構造とし、該分
割面から弁本体及び首部の内部をくり抜いて空洞
部としたことを特徴とする請求項(1)又は(2)記載
のバタフライ弁。 (4) 首部を弁本体とは別体の構造とし、首部の
分離面から内部をくり抜いて空洞部を形成したこ
とを特徴とする請求項(1)記載のバタフライ弁。 (5) 首部の外端面から内部ををくり抜いて空洞
部を形成したことを特徴とする請求項(1)記載の
バタフライ弁。[Claims for Utility Model Registration] (1) A butterfly valve consisting of a valve body with a cylindrical fluid passage formed inside, a disc-shaped valve body, and a seat ring interposed between the valve body and the valve body. A neck extending outward from a diametrically opposed position on the outer circumferential surface of the valve body to support the valve stem has a thickness that is the same as the thickness of the valve body at least along the fluid flow direction. A butterfly valve characterized in that a hollow portion is formed inside the neck portion. (2) The butterfly valve according to claim (1), wherein the cavity is also formed inside the valve body. (3) A claim characterized in that the valve body and neck are divided into two parts along a central plane parallel to the flange surface, and the insides of the valve body and neck are hollowed out from the divided plane to form a cavity. Butterfly valve described in (1) or (2). (4) The butterfly valve according to claim (1), wherein the neck is structured separately from the valve body, and a cavity is formed by hollowing out the interior from the separation surface of the neck. (5) The butterfly valve according to claim (1), wherein a hollow portion is formed by hollowing out the inside of the outer end surface of the neck portion.